25520825 has 48 divisors (see below), whose sum is σ = 37604736. Its totient is φ = 16972800.

The previous prime is 25520779. The next prime is 25520827. The reversal of 25520825 is 52802552.

It is not a de Polignac number, because 25520825 - 2⁸ = 25520569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25520827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 247724 + ... + 247826.

It is an arithmetic number, because the mean of its divisors is an integer number (783432).

Almost surely, 2^25520825 is an apocalyptic number.

25520825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25520825 is a deficient number, since it is larger than the sum of its proper divisors (12083911).

25520825 is a wasteful number, since it uses less digits than its factorization.

25520825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 25520825 is about 5051.8140306231. The cubic root of 25520825 is about 294.4183694590.

The spelling of 25520825 in words is "twenty-five million, five hundred twenty thousand, eight hundred twenty-five".